Bidisperse ferrofluids with chain aggregates: microstructure and macroscopic properties

E. Pyanzina

Ural Federal University, 51 Lenin ave., 620000, Ekaterinburg, Russia

Abstract
Ferrofluids can be viewed as particular interesting class of dipolar fluids, which have a wide range of potential application in biomedicine and technology and in this report the research of a bidisperse ferrofluids with chain aggregates are presented. A novel theoretical approach was developed to describe the microstructure and macroscopic properties of such systems. It was shown the presence of chains leads to an increase of the initial susceptibility in comparison with that of a homogeneous ferrocolloid. The behaviour of the structure factor in the region of the first peak and in the region of large wave vectors is studied in detail, and related to the observed microstructure. Obtained results demonstrate that the combined method developed is suitable for revealing the connection between microstructure and scattering images, and thus can help to interpret experimental results such as small angle neutron scattering images. Refs 3.